Seems there are rather a lot of varieties on these systems
http://spatialreference.org/ref/?search=RT90
If you find the right one there click on the proj4 there is the right
string if i'm not mistaken
http://spatialreference.org/ref/epsg/3022/proj4/
maybe the epsg code it self can be used as well if i read the CRS help
On 08/26/2010 02:29 PM, gianni lavaredo wrote:
Dear Resercher,
i am working on data from Sweden in RT 90 system and SWEREF 99 (TM) system.
I wish to use the proj4string but I can not find the right CRS. Thanks for
helping me and suggestion website to have a list
Gianni
proj4string(mydata)<- CRS("?????")
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